<?xml version="1.0"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema"
        xmlns:gml="http://www.opengis.net/gml"
        targetNamespace="http://www.opengis.net/gml"
        version="3.1.1" elementFormDefault="qualified">

  <include schemaLocation="basicTypes.xsd"/>

  <element name="_Object" abstract="true"/>

  <element name="_GML" type="gml:AbstractGMLType" abstract="true"
           substitutionGroup="gml:_Object"/>
  <complexType name="AbstractGMLType" abstract="true">
    <attribute ref="gml:id" use="optional"/>
  </complexType>

  <attribute name="id" type="ID"/>
</schema>
